Home / 5,366.51-7,405.08-3,128.78

Finding the Fourth Proportional to 5,366.51, 7,405.08 and 3,128.78

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Solution

The fourth proportional to 5,366.51, 7,405.08 and 3,128.78 is: 4,317.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,366.51 : 7,405.08 = 3,128.78 : x
  2. Step 2: Convert to fraction form
    5,366.51/7,405.08 = 3,128.78/x
  3. Step 3: Cross multiply
    5,366.51x = 7,405.08 × 3,128.78
  4. Step 4: Simplify right side
    5,366.51x = 23,168,845.21
  5. Step 5: Solve for x
    x = 23,168,845.21/5,366.51
  6. Step 6: Final answer
    x = 4,317.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.